Vertical boiler.



PATENTED JULY 11, 1905.

T. SUZUKL VERTICAL BOILER.

APPLICATION FILED MAR. 3

5 SHEETS-SHEET 1.

No. 794,199. PATENTED JULY 11, 1905.

T. SUZUKI. VERTICAL BOILER.

APPLICATION FILED MAB. 3, 1905.

5 SHEETS-SHEET 4.

PATBNTED JULY 11, 1905.

T. SUZUKI.

VERTICAL BOILER.

APPLIOATIION FILED MAR. a, 1905.

6 SHEETS-SHEET 5.

II I I NITED STATES- Patented July 11, 1905,

TOZABURO SUZUKI, OF SUNAMURA, JAPAN.

VERTICAL BOILER.

SPECIFICATION forming part of Letters Patent No. 794,199, dated July 11,1905.

A li ati fil d March 3, 1905- Seri al No. 248,320.

T0 on whom, it may concern:

Be it known that I, TOZABURO SUZUKI, a subject of the Emperor of Japan,residing at N o. Jibeishinden, Sunamura, in the county ofHinami-Katsushika, inthe Province of Tokyo, Japan, have invented certainnew and useful Improvements in. Vertical Boilers, of which the followingis a specification.

My invention relates to improvements in vertical boilers wherein theheat units of the products of combustion are expended on the contents ofthe boiler through the medium of one or more combustion-chambers, and isan improvement upon the invention disclosed in my application filed June30, 1904, Serial No. 214,754.

My invention relates more particularly to certain features in theconstruction of the combustionchambers, whereby the heat units of theproducts of combustion passing therethrough may be more fully andcompletely utilized.

My invention will be more fully described in connection with theaccompanying drawings and will be more particularly set forth in theappended claims.

In the drawings,Figure 1 represents a front elevation of boilerembodying the main features of my invention, showing the same supportedupon a furnace and also showing a superposed water-heater.

' cal section of the boiler shown in Fig. 1, illusi I i trating aportion of the furnace. Fig. 3 is a horizontal section on line 3 3 ofFig. 2. Fig. 4 is a modified form of the boiler shown in Fig. 2. Fig. 5is a horizontal section on line 5 5 of Fig. 4. Fig. 6 illustrates afurther modification of the boiler.

Like characters of reference indicate simi lar parts throughout thedifierent figures of the drawings.

My invention consistsgenerally, as shown, of a furnace F and asuperposed boiler B, provided with a feed-water heater H. The

furnace is provided with feeding-doors anddesirably discharges directlyinto the boiler. Said boiler B is provided with manholes b, safety-valvea, steam-gage C, and a water- 2 is a verti-- gage d. The products ofcombustion are directed from the furnace upwardly through the boiler andare delivered to the feed-water heater and led therefrom by a suitableoutlet 38. Gates are provided with a suitable controlling device 26,whereby the products of combustion may be directed from the boiler tothe outlet and whereby the feedwater heater will be thrown into and outof gear with the boiler. A valved feed-water pipe 39 connects directlywith the feed-water heater and may communicate with any suitable sourceof supply. A pipe 40, controlled by a valve 41, leads from thefeed-water heater to the boiler, connecting with an annular perforatedfeed-water pipe 22 therein. Blow-off pipes 24 are provided, whereby theaccumulating scale may be carried off in'the operation of cleaning theboiler.

I will now refer more particularly to Figs. 2 and 3 and to the specialfeatures of construction relating to the combustion-chamber. As hereinshown, the boiler consists of an outer shell 1, provided with animperforateupper wall 2 and a base-ring 3. The base-ring 3 is providedwith a central opening equal to the discharge-openlng of the fur nace,the latter being preferably capped by an annular plate 6, provided witha central opening relatively. reduced in size with respect to thedischarge-opening of the furnace. The opening of said plate 6 registerswith the main flue 18, which delivers at its upper end into a fire orcombustion chamber. Said combustion-chamber consists generally of topand bottom closed walls 8 and 7, connected at their margins by anannular wall 9. To the upper end of said closed wall 8 is secured asmoke flue or trunk 14, by means of which the products of combustion areled outwardly through the boiler and delivered to the feed-water heateror direct to an outlet. The walls 7 and 8 are provided withcentrally-disposed openings bringing the main flue 13 and smoke-trunk 14into communication, the said combustion-chamber otherwise being closedto the boiler. Said combustion-chamber comprises a centrallydisposedflame-trunk G, which registers with the main flue 13 and smoke-trunk 14and which is closed and opened by means of a damper 12. In the preferredconstruction the outer wall 9 of the combustion-chamber is of relativelyincreased diameter with respect to the flame-trunk, and in order to morefully utilize the heat units of the products of combustion the outerportions of the combustion-chamber are provided with water-tubes 10,which permit circulation of water through said chamber. In order thatthe entire Weight of the combustion-chamber may not be wholly thrownupon the main flue 13 and plate 6 and to provide a more rigid mountingfor the same, I have shown inclined suspension-rods 19, secured at theiropposite ends to the shell of the boiler 1' and the closed wall 8 of thefire-chamber. The flame-trunk is normally closed by a damper 12 toprevent the products of combustion from passing upwardly directly fromthe main flue to the smoke-trunk, and thereby securing greaterefliciency. To this end I provide on the lower wall 7 of thecombustion-chamber a flue structure 23, having a central bore on themargin of which the damper 12 is directly supported. Said flue structureis otherwise closed except for radial flues 11, which serve when thedamper is closed to receive the products of combustion from the mainflue 13 and direct them outwardly against and around the watertubes 10.It will be undertsood, however, that because of the relativelyrestricted size of the bore of the flue structure 23 compared to theflue 13 and flame-trunk G the products of combustion will to a certainextent pass outwardly through the flues 11 when the damper is open; butsuch outward travel will be relatively limited.

Next, referring more particularly to the construction of the flame-trunkG, whereby access of the products of combustion from the outer portionof the combustion-chamber centrally toward the flame-trunk is permitted,the same in the preferred construction is composed of wall-sections 42,which, as shown, are separated throughout their length in order that theflow of the products of combustion from the outer portions of thechamber to the flame-trunk may not beim.

peded. It will, however, be obvious that the said flame-trunk may bepartially closed in cases where a more restricted travel and a moregeneral circulation of the products of combustion in and around thetubes 10 is desired. In the construction shown the lateral travel of theproducts of combustion causes a'very general circulation about thevertically-disposed tubes 10, serving to encompass said tubessubstantially throughout their length. In the preferred construction theseparated Wall-sections 42 consist of metallic strips 18, suspended fromand connected with the upper wall 8 by short strips of angle-irons 17.Said strips 18 desirably extend from the upper wall 8 downwardly to theflue structure 23 and in the preferred construction are four in numberand are located at diametrically opposite points. Each of said strips 18is flanked on its outer face with a fireproof coating, serving toprotect them from direct contact with the products of combustion as theyflow into the flametrunk from the outer portion of thecombustion-chamber. By reference to Fig. 2 it will be noted that thestrips 18 will not be subjected'to direct contact with the, flame andheated vapors when the damper is open because of their outward position.Said protective fire-coating consists in the construction shown of aplurality of sections 16, inter locked with each other and supportedupon the strips 18 by bolts 46. Said bolts are provided on their outerends with nuts and on their inner ends with hooked ends adapted forengagement with strips 18.

The construction of the combustion-chamber secures a very general andcomplete circulation of the products of combustion around thewater-tubes and a very complete expenditure of the heat units thereof,the products of combustion being forced to travel in a generallycircuitous path without having its progress in any way restricted.

In Figs. 4 and 5 is shown a modified form wherein the annular feed-pipe22 is located some distance above the main flue 5. In this constructionthe fire-chamber is not only connected with the main flue 5, leadingfrom the furnace F, by a central flue 13, but also by combustion-tubes15, which enter the combustion-chamber at points outside the flametrunk.In this form of the device reliance will not be wholly placed upon theradial flues 11 in order to effect general distribution of products ofcombustion in the outer portion of the combustion-chamber. I alsopreferably supplant the fire-tubes 10 of my preferred form ofconstruction with larger tubes 10, which possess special advantageousfeatures for furnaces wherein water is used which contains accumulationsof foreign matter, the larger tubes being less liable to clog. In thisconstruction it will also be noted that by the addition of thecombustiontubes 15 a large amount of the heat units will be expendedupon the contents of the boiler before the general combustion-chamber isreached. The same characters of reference otherwise designate similarparts throughout the figures illustrating this modification.

In Fig.. 6 is shown a further modification of the boiler shown in Fig. 4employing the combustion-tubes 15 and a air of superposedcombustion-chambers. T e lower combustion-chamber in this constructionis provided with grou s of water-tubes 10, which are alternately isposedwith respect to the groups of combustion-tubes 15. In this form theannular perforated feed-pipe 22 is located adjacent the main flue 5.

While I have herein shown and described the specific forms of boilersembodying the main features of my invention, it will be understood thatI do not wish to be limited to these precise constructions, as it willbe readily seen that they may be materially altered without departingfrom the spirit of the invention; but

What I claim, and desire to secure by Letters Patent, is

1. A boiler provided with a furnace, a main flue leadin upwardly fromsaid furnace into the boi er, a combustion-chamber within said boiler towhich said main flue delivers, a smoke-trunk extending from saidcombustion-chamber through said boiler to a suitable outlet, saidcombustion-chamber having a central flame-trunk communicating with saidsmoke-trunk and main flue, a removable damper for said flame-trunk,radial flues located below said dam er conveying the products ofcombustion aterally, said combustion-chamber having a plurality ofwater-tubes against which the products .of combustion are directed, saidflame-trunk being formed of separated walls, permitting the products ofcombustion to travel inwardly and deliver to the smoke-trunk.

2. A boiler providedvwith a furnace, a main flue leadin upwardly fromsaid furnace into the b0 er, a combustion-chamber within said boiler towhich said main flue delivers, a smoke-trunk extending from saidcombustion-chamber through said boiler to a suitable outlet, saidcombustion-chamber having a central flame-trunk communicating with saidsmoke-trunk and main flue, a removable damper for said flame-trunk,radial flues located below said dam er conveying the products ofcombustion aterally, said combustion-chamber having a plurality ofwater-tubes against which the products of combustion are directed, saidflame-trunk being formed of separated walls permitting the products ofcombustion to travel inwardly and deliver to the smoke-trunk when saiddamper is closed, and suspension-rods secured to said combustion-chamberand boiler and supporting said chamber in posi tion therein.

3. A boiler provided with a furnace, a main flue leading upwardly fromsaid furnace into the boiler, a combustion-chamber within said boiler towhich said main flue delivers, a smoke-trunk extending from saidcombustion-chamber outwardly through said boiler to a suitable outlet,said combustionchamber having a central flame-trunk communicating withsaid smoke-trunk and main flue, a removable damper for said flametrunk,radial flues located below said damper conveying the products ofcombustion laterally, said combustion-chamber having a plurality ofwater-tubes against which the products of combustion are directed, saidflame-trunk being formed of separated walls permitting the products ofcombustion to travel inwardly and deliver to the smoketrunk when saiddamper is closed, and an annular perforated feed-water pipe located adjacent said main flue.

4. A boiler provided with a furnace, a main flue leading upwardly fromsaid furnace into the boiler, a combustion-chamber within said boiler towhich said main flue delivers, a smoke-trunk extending from saidcombustion-chamber through said boiler to a suitable outlet, saidcombustion-chamber having a central flame-trunk communicating with saidsmoke-trunk and main flue, a removable damper for said flame-trunk,radial flues located below said damper conveying the roducts ofcombustion laterally beyond t e flame-trunk, said combustionchamberhaving a plurality of water-tubes against which the products ofcombustion are directed, said flame-trunk being formed of separatedwalls, permitting the products of combustion to travel inwardly anddeliver to the smoke-trunk when said damper is closed, and feeding meansfor the boiler located adjacent said main flue.

5. A boiler provided with a furnace, a main flue leading upwardly fromsaid furnace into the boiler, a combustion-chamber within said boiler towhich said main flue delivers, a smoke-trunk extending from saidcombustion-chamber through said boiler to a suitable outlet, saidcombustion-chamber having a central flame-trunk communicating with saidsmoke-trunk and main flue, said combustion-chamber having top, bottomand side walls closed to the boiler, said flametrunk being formed by aplurality of separated wall-sections suspended from said top wall andterminating a distance above said lower wall, a flue structure supportedby said lower wall and engaging the separated wallsections on theirlower ends, said flue structure having laterally-directed flues and acentral bore registering with the flame- 1grunk, and a damper forclosing said central ore.

6. A boiler provided with a furnace, a main flue leading upwardly fromsaid furnace into the boiler, a combustion-chamber within said boiler towhich said main flue delivers, a smoke-trunk extending from saidcombustion-chamber outwardly through said boiler, saidcombustion-chamber having a central flame-trunk communicating with saidsmoke-trunk and main flue, said combustion-chamber having top, bottomand side walls closed to the boiler, said flame-- trunk being formed bya plurality of separated wall-sections suspended from and supported bysaid top wall and terminating adis- IIO tance above said lower wall aflue structure supported by said lower wall and engaging the separatedwall-sections on their lower ends, said flue structure havinglaterally-directed flues and a central bore registering with theflame-trunk, a damper for closing said bore, and a plurality ofwater-tubes against which the products of combustion discharged fromsaid lateral flues are directed.

7. A boiler provided with a furnace, a main flue leading upwardly fromsaid furnace into the boiler, a combustion-chamber within said boiler towhich said main flue delivers, a smoke-trunk extending from saidcombustion-chamber outwardly through said boiler, saidcombustion-chamber having a central flame-trunk communicating with saidsmoke-trunk and main flue, said combustion chamber having top, bottomand side walls closed to the boiler, said flame-trunk being formed by aplurality of separated wall-sections suspended from and supported bysaid top wall and terminating a distance above said lower wall andengaging the separated wallsections on'its upper face, said fluestructure having laterally-directed flues and a central bore registeringwith the flame-trunk, a damper for closing said central bore, aplurality of water-tubes against which the products of combustiondischarged from said lateral flues are directed, and suspension-rodssecured to said upper closed wall and said boiler and supporting .saidcombustion-chamber in position.

8. A boiler provided with a furnace, a main flue extending up withinsaid boiler, a combustion-chamber to which said main flue deliverscomprising upper, lower and side walls closed to the boiler, asmoke-trunk ex tending up within said boiler, said combustion-chamberhaving a flame-trunk communicating with. said flue and smoke-trunk, saidflame-trunk comprising a plurality of separated wall-sections composedof verticallydisposed strips suspended from the upper wall of saidcombustion-chamber, each of said strips being flanked with fireproofmaterial. on their outer sides, said combustionchamber having a damperadapted to close communication between said flame-trunk and main flue,and having radial flues leading the products of combustion outwardlyfrom said main flue. I

9. A boiler provided with a furnace, a main flue extending up withinsaid boiler, a combustion-chamber to which said main flue deliverscomprising upper, lower and side walls closed to the boiler, asmoke-trunk extending up within said boiler, said combustion-chamberhaving a flame-trunk communicating with said flue and smoke-trunk, saidflame-trunk comprising a plurality of separated wall-sections composedof vertically-disposed strips suspended from the upper wall of saidcombustion-chamber, each of said strips, being flanked with fireproofmaterial on their outer sides, said combustionchamber having a damperadapted to close communication between said flame-trunk and main flue,and having radial flues lead ing the roducts of combustion outwardlyfrom sai main flue, said combustion-chamber having water-tubes open tothe boiler and against which the roducts of combustion are directed fromsa1d radial flues.

10. A boiler provided with a furnace, a main flue extending up withinsaid boiler, a combustion-chamber to which said main flue deliverscomprising upper, lower and side walls closed to the boiler, asmoke-trunk extending up within said boiler, said combustionchamberhaving a flame-trunk communicating with said flue and smoke-trunk saidflame-trunk comprising a plurality of later ally-separated wall-sectionscomposed of vertically-disposed strips suspended from the upper Wall ofsaid combustion-chamber, each of said strips being flanked on theirouter sides with a plurality of sections of fireproof material, saidsections interfitting and being clamped by bolts to said strips, saidcombustion-chamber having a damper adapted to close communicationbetween said flametrunk and main flue, and having radial flues leadingthe products of combustion outwardly from said main flue.

11. A boiler provided with a combustionchamber, a central flame-trunkfor said chamber, a plurality of water-tubes surrounding said trunk, aremovable damper for said trunk, and a plurality of radial flues locatedbelow said damper whereby the products of combustion may be directedlaterally against said tubes.

12. A boiler provided with a combustionchamber, a central flame-trunkfor said chamber formed of separated walls, a plurality of water-tubessurrounding said trunk, a damper for said flame-trunk, and a pluralityof radial flues located below said damper whereby the products ofcombustion may be directed laterally against said tubes.

13. A boiler provided with a combustionchamber, a central flame-trunkfor said chamber formed of separated walls, each wall comprising apendent strip of metal having an outer coating of fireproof material, aplurality of water-tubes surrounding said trunk, radial flues for saidchamber, and a damper for said trunk serving to direct the products ofcombustion laterally through the flues against said tubes.

14. A boiler provided with a combustionchamber, a central flame-trunkfor said chamber formed of separated walls, each wall comprising apendent strip of metal having an outer coating of fireproof material, aplurality of water-tubes for said chamber, and radial flues for carryingthe products of combustion outwardly in said chamber.

15. A boiler provided with a combustion for carrying the products ofcombustion outchamber, a central flame-trunk for said wardly in saidchamber, and means for closcharnber provided with openings, a pluralitying the flame-trunk between said flues and of water-tubes for saidchamber, and radial openings.

5 lines for carrying the products of combus- In testimony whereof Iaflix my signature I 5 tion outwardly in said chamber. in presence oftwo witnesses.

16. A boiler provided with a combustion- TOZABURO SUZUKI. chamber, acentral flame-trunk for said Witnesses: chamber provided with openings,a plurality UHAOHI TsHIWARA,

10- of water-tubes for said chamber, radial fiues GEUJI KURIBARA.

